I doubt we'll ever get an entirely new form. Perhaps after they update player character models, we'll see an update to travel/aquatic/moonkin form. I still really want to see them replace that strange, nonsensical cheeta form with something more like the Malorne-model stag.

New forms are out of the question really. I can't think of any form that druids could use. But like others said a graphic update would be in place. WTB new moonkin, the current one looks so outdated, and you're in the form all the time unlike the tree form which is now a cooldown and did get an update.

Can't see it being likely.
You already have forms catering to every role, so leaving no room for additional ones unless on a cooldown as an enhanced form of an existing one.
But is that really a new form then ?

Would be great with some minor glyphs that would alter the forms. Quickly got bored of the new cat form tbh, but from Blizzard's track record, I doubt they will change things up for at least several years (closer to 10 most likely).

EDIT: Yeah, had a feeling it would be through glyphs instead of a basis revamp.

I doubt we'll ever get an entirely new form. Perhaps after they update player character models, we'll see an update to travel/aquatic/moonkin form. I still really want to see them replace that strange, nonsensical cheeta form with something more like the Malorne-model stag.

I didn't spend a lot of time actually playing a druid, but I did hear a bit of interesting news while I was playing other classes, so I hopped onto my premade druid to find out for myself. I was able to confirm that, yes, there are some minor glyphs druids are going to absolutely adore. Here they are:
Glyph of Stars: Transforms your Moonkin Form into Astral Form. This glyph essentially makes your character appear as a spirit instead of a moonkin. You look very nearly like you do while dead -- but people can see you this time. And your armor, for that matter.
Glyph of the Orca: Transforms your Aquatic Form into an orca. This one is pretty straightforward. Remember those orcas in Northrend? Yeah. Much better than your weird snarling rubbery seal.
Glyph of the Chameleon: Gives you a random appearance when you shift into Bear or Cat Form. Essentially, this one gives you a random coloring every time you shift. Great for breaking up the monotony of locked-in bear/cat coloring.
Glyph of the Stag: Transforms your Travel Form into a stag that other players can mount. Yes, that's right. Your pals can ride you while you're in Travel Form, and you're also a stag instead of the clearly-inferior cheetah.
Glyph of the Tree: Lets you transform into Treant Form